Will we find out tonight? Take this pre-show time to get your bets down!
My vote: he’s alive. Under the dumpster, then either walker-guts or turtle-shells the dumpster to the stairwell. Then up to the rooftop like a post-apocalyptic Santa Claus.
But that’s just me, and I won’t be surprised if we only see zombie-Glenn (in fulfillment of the S4 school bus tease).
Run! Run quickly! Come, spoilers!